The U.S. defense secretary expressed confidence that U.S. and India will work out differences centered on CAATSA.

Almaz-Antey Group reportedly delivered the year's final S-400 regimental set to the Russian armed forces earlier this month.

The 40N6 missile for the S-400 air defense system was accepted into Russian service earlier this month.

India is expected to receive its new S-400 air defense systems within two years, according to a senior Russian defense official.

India and Russia signed a deal for the procurement of five S-400 regiments on October 5 despite the threat of U.S. sanctions.

India’s Cabinet Committee on Security has cleared the procurement of five S-400 regiments last week, according to government sources.

The Trump administration imposed sanctions on the Chinese military this Thursday. The Chinese government demanded the sanctions be withdrawn.

The U.S. is so far reserving the option of sanctioning India over the purchase of Russian-made air defense systems.

The Russian defense industry has reportedly delivered a new S-400 regiment to the Russian armed forces ahead of schedule.

India wants to better understand Washington’s concerns over its ongoing procurement of Russian military hardware.

A new provision makes it unlikely that India will face sanctions over its purchase of missile air defense systems from Russia.

The Russian military took delivery of another complete S-400 regiment this week.

The new missile may be inducted into service by the end of the summer.

India’s defense minister reiterated New Delhi’s determination to go ahead with procuring the Russian-made missile air defense system.

India and Russia are likely going to announce the deal before an Indo-Russian bilateral summit scheduled for October, according to a source.

A contract for the delivery of Russian-made S-400 missile air defense systems to India has still not been signed.